C/Memory/Memory Compare
Compare two buffers: how to use memcmp
#include <stdio.h>
#include <string.h>
int main ()
{
char str1[256];
char str2[256];
int n, len1, len2;
printf ("Enter a sentence: ");
gets(str1);
printf ("Enter another sentence: ");
gets(str2);
len1=strlen(str1);
len2=strlen(str2);
n = memcmp ( str1, str2, len1 > len2 ? len1 : len2 );
if (n>0)
printf (""%s" is greater than "%s"", str1, str2);
else if (n<0)
printf (""%s" is less than "%s"",str1,str2);
else
printf (""%s" = "%s"\n",str1,str2);
return 0;
}
Memory compare
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
int outcome, len, l1, l2;
if(argc!=3) {
printf("Incorrect number of arguments.");
exit(1);
}
/* find the length of shortest string */
l1 = strlen(argv[1]);
l2 = strlen(argv[2]);
len = l1 < l2 ? l1:l2;
outcome = memcmp(argv[1], argv[2], len);
if(!outcome) printf("Equal");
else if(outcome<0) printf("First less than second.");
else printf("First greater than second.");
return 0;
}